So here is how you would do it: Projected sales = fixed exp (足ꯠ) divided by 1_ƖǑ% + 27ǔ% + 12ǔ% + 25% (your new profit margin) = 造같 (new sales) You can do this for as many years out as you want. Obviously this is based on your first year's fixed expenses remaining constant and no consideration of depreciation, inflation, or taxes. But most likely you would need to increase your fixed expenses because you're going to probably have more rent, utilities, or such as your business grows. So, you would simple put in your new fixed expense number in place of the existing one for each of the years you would be planning for. So, you see if you decided you wanted a 35% profit margin at year 5 then you could see how much sales it would take to give you that. Now it's also important to know how many more customers you would need as well so you should always look at that unless you have another way of growing your sales other than with new customers.
Any casual viewer of the BBC programme, Dragons Den will be aware of how easy it is for weaknesses or gaps to be identified. Depending upon the purpose of the plan, this may, or may not, prove to be critical. It is often easier to recognise such weaknesses and gaps, and be prepared to deal with them, either by noting them in the plan itself, or having appropriate answers available should the need arise.